{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:1996:SH4A5KPFTC562VAG4S225Z3Z34","short_pith_number":"pith:SH4A5KPF","schema_version":"1.0","canonical_sha256":"91f80ea9e598bbed5406e4b5aee779df32655b7210a5f730a25973fbd15b04f8","source":{"kind":"arxiv","id":"astro-ph/9608171","version":1},"attestation_state":"computed","paper":{"title":"Variability of the iron K-emission line in the Seyfert 1 galaxy NGC 3516","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"I.M. George, K. Nandra, NASA/GSFC), R.F. Mushotzky, T.J. Turner (LHEA, T. Yaqoob","submitted_at":"1996-08-26T21:32:22Z","abstract_excerpt":"We present strong evidence for variability of the flux of the iron K$\\alpha$ emission line in the Seyfert 1 galaxy, NGC 3516. Two ASCA observations, separated by $\\sim 1$~yr, showed a marked decrease in continuum flux by $\\sim 60$~per cent. The flux in the broad, iron K$\\alpha$ line decreased by the same factor in this time period, with no evidence for changes in the line profile. The line variability is significant at $>99$~per cent confidence and rules out models in which the line is produced in a molecular torus located at $>1$~pc from the nucleus. An accretion disk is considerably more lik"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"astro-ph/9608171","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"astro-ph","submitted_at":"1996-08-26T21:32:22Z","cross_cats_sorted":[],"title_canon_sha256":"75bd341cf461a9eed4f7eab28ba39bc2e202692d30b4d88bf87c11a65293ce78","abstract_canon_sha256":"9c1369b5ab9acca6adf4912595c9f817168ba7be1b0f6ebfd77b0f18f832809e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:58.895507Z","signature_b64":"B0NpHYDF4kvkkc/DLYcJ8Z2L2J+dOZ/N+Ak6S0smdpLDt/621VV0FZuR0vInunjo3dgghNP2K8rM2jPTvB+NDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"91f80ea9e598bbed5406e4b5aee779df32655b7210a5f730a25973fbd15b04f8","last_reissued_at":"2026-05-18T01:22:58.894971Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:58.894971Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Variability of the iron K-emission line in the Seyfert 1 galaxy NGC 3516","license":"","headline":"","cross_cats":[],"primary_cat":"astro-ph","authors_text":"I.M. George, K. Nandra, NASA/GSFC), R.F. Mushotzky, T.J. Turner (LHEA, T. Yaqoob","submitted_at":"1996-08-26T21:32:22Z","abstract_excerpt":"We present strong evidence for variability of the flux of the iron K$\\alpha$ emission line in the Seyfert 1 galaxy, NGC 3516. Two ASCA observations, separated by $\\sim 1$~yr, showed a marked decrease in continuum flux by $\\sim 60$~per cent. The flux in the broad, iron K$\\alpha$ line decreased by the same factor in this time period, with no evidence for changes in the line profile. The line variability is significant at $>99$~per cent confidence and rules out models in which the line is produced in a molecular torus located at $>1$~pc from the nucleus. An accretion disk is considerably more lik"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"astro-ph/9608171","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"astro-ph/9608171","created_at":"2026-05-18T01:22:58.895052+00:00"},{"alias_kind":"arxiv_version","alias_value":"astro-ph/9608171v1","created_at":"2026-05-18T01:22:58.895052+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.astro-ph/9608171","created_at":"2026-05-18T01:22:58.895052+00:00"},{"alias_kind":"pith_short_12","alias_value":"SH4A5KPFTC56","created_at":"2026-05-18T12:25:48.327863+00:00"},{"alias_kind":"pith_short_16","alias_value":"SH4A5KPFTC562VAG","created_at":"2026-05-18T12:25:48.327863+00:00"},{"alias_kind":"pith_short_8","alias_value":"SH4A5KPF","created_at":"2026-05-18T12:25:48.327863+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/SH4A5KPFTC562VAG4S225Z3Z34","json":"https://pith.science/pith/SH4A5KPFTC562VAG4S225Z3Z34.json","graph_json":"https://pith.science/api/pith-number/SH4A5KPFTC562VAG4S225Z3Z34/graph.json","events_json":"https://pith.science/api/pith-number/SH4A5KPFTC562VAG4S225Z3Z34/events.json","paper":"https://pith.science/paper/SH4A5KPF"},"agent_actions":{"view_html":"https://pith.science/pith/SH4A5KPFTC562VAG4S225Z3Z34","download_json":"https://pith.science/pith/SH4A5KPFTC562VAG4S225Z3Z34.json","view_paper":"https://pith.science/paper/SH4A5KPF","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=astro-ph/9608171&json=true","fetch_graph":"https://pith.science/api/pith-number/SH4A5KPFTC562VAG4S225Z3Z34/graph.json","fetch_events":"https://pith.science/api/pith-number/SH4A5KPFTC562VAG4S225Z3Z34/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/SH4A5KPFTC562VAG4S225Z3Z34/action/timestamp_anchor","attest_storage":"https://pith.science/pith/SH4A5KPFTC562VAG4S225Z3Z34/action/storage_attestation","attest_author":"https://pith.science/pith/SH4A5KPFTC562VAG4S225Z3Z34/action/author_attestation","sign_citation":"https://pith.science/pith/SH4A5KPFTC562VAG4S225Z3Z34/action/citation_signature","submit_replication":"https://pith.science/pith/SH4A5KPFTC562VAG4S225Z3Z34/action/replication_record"}},"created_at":"2026-05-18T01:22:58.895052+00:00","updated_at":"2026-05-18T01:22:58.895052+00:00"}